/*************************************************/
/************ Telémaco Sistemas S.L **************/
/*************************************************/

function isEmail(str)
{
  // are regular expressions supported?
  var supported = 0;
  if (window.RegExp) {
    var tempStr = "a";
    var tempReg = new RegExp(tempStr);
    if (tempReg.test(tempStr)) supported = 1;
  }
  if (!supported) 
    return (str.indexOf(".") > 2) && (str.indexOf("@") > 0);
  var r1 = new RegExp("(@.*@)|(\\.\\.)|(@\\.)|(^\\.)");
  var r2 = new RegExp("^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$");
  return (!r1.test(str) && r2.test(str));
}

function chequeo()
{
	vari = isEmail(document.envio.MAILFROM.value);
	if (!vari){
		alert('Su correo electrónico no parece válido.\nIntrodúzcalo en el campo indicado.');
		}
	else envio.submit();
}

/*********** Ventana popup *************/
function js_Ventana(www,ancho,alto,titulo,target)
{
	var destino=www+'#'+target;
	var ventana=window.open(destino,titulo,'status=no,scrollbars=no,location=0,0, resizable=no,width='+ancho+',height='+alto, target);
	ventana.opener.top.name="opener";
	ventana.focus();
}
/*********** Transparencias png *************/
function PNG_loader() {
   for(var i=0; i<document.images.length; i++) {
      var img = document.images[i];
      var imgName = img.src.toUpperCase();
      if (imgName.substring(imgName.length-3, imgName.length) == "PNG") {
         var imgID = (img.id) ? "id='" + img.id + "' " : "";
         var imgClass = (img.className) ? "class='" + img.className + "' " : "";
         var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' ";
         var imgStyle = "display:inline-block;" + img.style.cssText;
         if (img.align == "left") imgStyle += "float:left;";
         if (img.align == "right") imgStyle += "float:right;";
         if (img.parentElement.href) imgStyle += "cursor:hand;";
         var strNewHTML = "<span " + imgID + imgClass + imgTitle
            + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
            + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
            + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>";
         img.outerHTML = strNewHTML;
         i--;
      }
   }
}

if (navigator.appVersion.indexOf("MSIE 6")!=-1)//explorer 6
  window.attachEvent("onload", PNG_loader);